Description
The Omron CJ2M-CPU11 is an entry-level CPU Unit for the SYSMAC CJ2M Series PLC, designed for compact machine control where program size and cost are moderate, but the benefits of CJ2M architecture (fast execution, built-in USB programming port) are desired.
- CJ2M-CPU11 → Program capacity 10K steps (20KB), Data Memory 32K words, Basic instruction execution 0.04 µs (LD), Built-in USB Type B port (front — for CX-Programmer via standard USB A-B cable) — NO built-in serial port (unlike CPU31/32/33). If serial comms needed → add a serial communications unit (CJ1W-SCU21-V1 for RS-232C/RS-485).
- Compatible with all CJ-series Base Units (CJ1W-PA202 / PA205) and CJ-series I/O modules (CJ1W-ID211, CJ1W-OD211, CJ1W-AD041 etc.) — same rack as CJ2M-CPU3x / CJ1M CPUs.
- Programs from CJ1M can typically be opened/converted in CJ2M with minor checks — CJ2M is the direct successor to CJ1M.
- Configured with CX-Programmer V9.0+ (recommend V9.6x / CX-One suite).
Typical use: Small to mid-size standalone machines (index tables, simple packaging stations, test fixtures) where 10K steps suffice and USB programming convenience is preferred over older peripheral-cable CPUs.
Key Features
- Program Capacity: 10K steps (20 KB)
- Data Memory (DM): 32K words (DM 0–32767 + Extended DM if enabled — total 32K)
- Execution Speed: 0.04 µs (boolean LD instruction)
- Built-in Port: 1 × USB Type B (front — PC connection for program/download/monitor — no RS-232C on CPU11)
- Max. I/O Points: 2560 (CJ2M limit — actual limited by PSU & modules per rack)
- Expansion: Up to 3 expansion racks via CJ1W-II101/II201 couplers
- Country of Origin: Japan (Omron Corporation)
Model & Variant Reference (Omron CJ2M CPU Family — Comparison)
Model | Program Cap. | DM Words | Built-in Comms | Best For |
|---|---|---|---|---|
CJ2M-CPU11 (listed) | 10K steps (20KB) | 32K | USB only — no serial | Cost-effective small machine — no need for onboard serial |
CJ2M-CPU12 | 20K steps | 32K | USB only | Slightly larger program than CPU11 — still no serial |
CJ2M-CPU13 | 20K steps | 32K | USB + RS-232C | If you need built-in serial on small program — CPU13 exists (older CJ2M sub-family — check availability) |
CJ2M-CPU31 | 60K steps | 128K | USB only | Mid-size — no serial |
CJ2M-CPU32 | 60K steps | 128K | USB + RS-232C (9-pin D-Sub) | General purpose — built-in serial for HMI/printer |
CJ2M-CPU33 | 60K steps | 128K | USB + RS-485 (isolated 2-wire) | Need RS-485 multi-drop (Modbus RTU / Host Link Multi) |
CJ1M-CPU11/12/13 (legacy) | 10K/20K steps | 16K/32K | Peripheral (round) + optional RS-232C | Discontinued — shown for contrast |
⚠️ Critical Notes:
Technical Specifications (CJ2M-CPU11 — SYSMAC CJ2M CPU Unit, USB Only, 10K Steps)
Parameter | Specification |
|---|---|
Model / Order Code | CJ2M-CPU11 (Omron SYSMAC CJ2M CPU Unit — Entry) |
Series | SYSMAC CJ2M (successor to CJ1M) |
Program Capacity | 10 K steps (20 KB — user program + comments in flash) |
Data Memory (DM) | 32 K words (DM 0–32767 standard; Extended DM available within 32K pool — check settings) |
Timer / Counter | Timers: 4096 (T0–T4095); Counters: 4096 (C0–C4095); HR: 8192 bits (H0–H511.15); AR: 1024 bits (A0–A63.15); LR: 1024 bits (L0–L63.15) |
Instruction Execution Time | 0.04 µs (boolean LD); ~ 0.12–0.2 µs for MOV / math (see catalog) |
Built-in Interface | 1 × USB Type B (front — USB 2.0 Full Speed — for CX-Programmer connection) — NO RS-232C/485 on CPU |
Max. I/O Points (Physical) | 2560 points (CJ2M architecture limit — actual limited by PSU & installed modules) |
Max. Expansion Racks | 3 (using CJ1W-II101 inner coupler + CJ1W-II201 outer — total 4 racks incl. CPU rack) |
Required Power Supply | CJ1W-PA202 (100–240V AC in, 5V/24V DC out) or CJ1W-PA205 (24V DC in) — NOT included with CPU |
Backup (Retentive Area) | Super capacitor (holds retentive DM/HR/T/C ∼ 20 days typical); Optional CJ1W-BAT01 battery for long-term backup |
Operating Temp. | 0 … +55 °C (no freezing/dewing) |
Dimensions (W×H×D) | 31 mm (W) × 90 mm (H) × 65 mm (D) — standard CJ CPU slot width (1 unit) |
Weight | ~ 0.09 kg |
Standards | CE, UL, cUL, KC, RoHS |
Software | CX-Programmer V9.0+ (part of CX-One) — recommend V9.6x or later |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty (power-up + program download/monitor via USB)
- Technical support for:
- Rack composition (CJ1W-PA202/PA205 PSU selection — check 5V backplane current draw of I/O modules)
- CX-Programmer USB connection (install CX-One → select “USB” in PLC/PC Interface → Auto-detect CJ2M)
- Serial comms add-on advice (if need HMI serial link → recommend CJ1W-SCU21-V1 RS-232C/485 unit — or upgrade CPU to CJ2M-CPU32 if program fits 60K steps)
- Memory backup (install CJ1W-BAT01 if retaining DM/HR/T/C through extended power-off)
- I/O addressing walkthrough (CIO word per slot — e.g., 16-pt input in Slot 1 = CIO 0–0F hex)
- CJ1M → CJ2M migration note (open old .cxp in CX-P → convert — check special I/O settings)
- Optional: CJ1W-PA202/PA205 PSU, CJ1W-BAT01 battery, USB A-B cable, CJ1W-SCU21-V1 serial unit, CJ-series I/O modules
Delivery Time
- Standard delivery: 3-5 working days (stock items)
- Express shipping available upon request
Why Choose Our Store
- Genuine Omron SYSMAC CJ2M CPUs — not gray-market (counterfeit flash risk)
- Global supply network with competitive pricing
- Expertise in Omron CJ-series system design (PSU sizing, I/O selection, USB/serial comms, CX-Programmer tips)
- Comprehensive technical documentation (CJ2M I/O slot addressing table, USB connection steps, no-serial workaround options)
- Responsive customer service and support
Applications
- Small Standalone Machines: Index tables, pick-place units, simple test fixtures — 10K steps ample.
- Retrofit CJ1M-CPU11/12: Drop-in replacement (mostly code-compatible) — gain USB programming, faster scan, larger DM (32K vs 16K on old CJ1M-CPU11).
- Cost-Sensitive OEM: Entry CJ2M with USB convenience but no paid-for unused serial port.
- Lab / Training Rigs: Easy USB connectivity to student laptops via CX-Programmer.
- Expandable: Add CJ1W-SCU□□ for serial later if requirements change; add analog/digital I/O as needed.
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